Function mapTimelineDisplayTimeToSourceTime

apps/web/lib/video-edits.ts:483–515

(
	state: VideoTimelineState,
	displayTime: number,
)

}

export function mapTimelineDisplayTimeToSourceTime(
	state: VideoTimelineState,
	displayTime: number,
) {
	const duration = normalizeDuration(state.duration);
	const displayDuration = getTimelineDisplayDuration({ ...state, duration });
	if (duration <= 0 || displayDuration <= 0 || !isFiniteNumber(displayTime)) {
		return 0;
	}

	const time = clampEditTime(displayTime, 0, displayDuration);
	let sourceCursor = 0;
	let displayCursor = 0;
	for (const range of getDisplayDeletedRanges({ ...state, duration })) {
		const keptDuration = Math.max(0, range.start - sourceCursor);
		const displayEnd = displayCursor + keptDuration;
		if (time <= displayEnd + EPSILON) {
			return roundEditTime(
				clampEditTime(
					sourceCursor + time - displayCursor,
					sourceCursor,
					range.start,
				),
			);
		}
		sourceCursor = range.end;
		displayCursor = displayEnd;
	}

	return roundEditTime(
		clampEditTime(sourceCursor + time - displayCursor, sourceCursor, duration),
	);
}

export function getTimelineDisplaySegments(
	state: VideoTimelineState,